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418e529ef4
linux/net
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Eric Dumazet 418e529ef4 llc: better deal with too small mtu 
[ Upstream commit 2c5d5b13c6 ]

syzbot loves to set very small mtu on devices, since it brings joy.
We must make llc_ui_sendmsg() fool proof.

usercopy: Kernel memory overwrite attempt detected to wrapped address (offset 0, size 18446612139802320068)!

kernel BUG at mm/usercopy.c:100!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 17464 Comm: syz-executor1 Not tainted 4.17.0-rc3+ #36
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:88
RSP: 0018:ffff8801868bf800 EFLAGS: 00010282
RAX: 000000000000006c RBX: ffffffff87d2fb00 RCX: 0000000000000000
RDX: 000000000000006c RSI: ffffffff81610731 RDI: ffffed0030d17ef6
RBP: ffff8801868bf858 R08: ffff88018daa4200 R09: ffffed003b5c4fb0
R10: ffffed003b5c4fb0 R11: ffff8801dae27d87 R12: ffffffff87d2f8e0
R13: ffffffff87d2f7a0 R14: ffffffff87d2f7a0 R15: ffffffff87d2f7a0
FS:  00007f56a14ac700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bc21000 CR3: 00000001abeb1000 CR4: 00000000001426f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000030602
Call Trace:
 check_bogus_address mm/usercopy.c:153 [inline]
 __check_object_size+0x5d9/0x5d9 mm/usercopy.c:256
 check_object_size include/linux/thread_info.h:108 [inline]
 check_copy_size include/linux/thread_info.h:139 [inline]
 copy_from_iter_full include/linux/uio.h:121 [inline]
 memcpy_from_msg include/linux/skbuff.h:3305 [inline]
 llc_ui_sendmsg+0x4b1/0x1530 net/llc/af_llc.c:941
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 __sys_sendto+0x3d7/0x670 net/socket.c:1789
 __do_sys_sendto net/socket.c:1801 [inline]
 __se_sys_sendto net/socket.c:1797 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455979
RSP: 002b:00007f56a14abc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f56a14ac6d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000018
RBP: 000000000072bea0 R08: 00000000200012c0 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000548 R14: 00000000006fbf60 R15: 0000000000000000
Code: 55 c0 e8 c0 55 bb ff ff 75 c8 48 8b 55 c0 4d 89 f9 ff 75 d0 4d 89 e8 48 89 d9 4c 89 e6 41 56 48 c7 c7 80 fa d2 87 e8 a0 0b a3 ff <0f> 0b e8 95 55 bb ff e8 c0 a8 f7 ff 8b 95 14 ff ff ff 4d 89 e8
RIP: usercopy_abort+0xbb/0xbd mm/usercopy.c:88 RSP: ffff8801868bf800

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-26 08:48:46 +02:00
..
6lowpan
9p net/9p: Switch to wait_event_killable() 2017-11-30 08:37:25 +00:00
802
8021q vlan: also check phy_driver ts_info for vlan's real device 2018-04-13 19:50:25 +02:00
appletalk
atm net: atm: Fix potential Spectre v1 2018-05-16 10:06:51 +02:00
ax25 ax25: Fix segfault after sock connection timeout 2017-02-04 09:45:09 +01:00
batman-adv batman-adv: handle race condition for claims between gateways 2018-03-22 09:23:21 +01:00
bluetooth Bluetooth: Send HCI Set Event Mask Page 2 command only when needed 2018-04-13 19:50:21 +02:00
bridge bridge: check iface upper dev when setting master via ioctl 2018-05-26 08:48:46 +02:00
caif net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx 2017-07-05 14:37:14 +02:00
can can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once 2018-01-31 12:06:08 +01:00
ceph libceph: validate con->state at the top of try_write() 2018-05-02 07:53:42 -07:00
core net: fix uninit-value in __hw_addr_add_ex() 2018-05-16 10:06:50 +02:00
dcb
dccp dccp: fix tasklet usage 2018-05-26 08:48:46 +02:00
decnet dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock 2018-02-25 11:03:38 +01:00
dns_resolver KEYS: DNS: limit the length of option strings 2018-04-29 07:50:04 +02:00
dsa net: dsa: select NET_SWITCHDEV 2017-11-15 17:13:11 +01:00
ethernet net: introduce device min_header_len 2017-02-18 16:39:27 +01:00
hsr net/hsr: fix a warning message 2015-11-23 14:56:15 -05:00
ieee802154 net: ieee802154: fix net_device reference release too early 2018-04-13 19:50:10 +02:00
ipv4 ipv4: fix memory leaks in udp_sendmsg, ping_v4_sendmsg 2018-05-26 08:48:46 +02:00
ipv6 ipv6: add RTA_TABLE and RTA_PREFSRC to rtm_ipv6_policy 2018-04-29 07:50:06 +02:00
ipx ipx: call ipxitf_put() in ioctl error path 2017-05-25 14:30:13 +02:00
irda irda: do not leak initialized list.dev to userspace 2017-08-30 10:19:21 +02:00
iucv net/iucv: Free memory obtained by kzalloc 2018-03-31 18:12:33 +02:00
key af_key: Fix slab-out-of-bounds in pfkey_compile_policy. 2018-04-13 19:50:01 +02:00
l2tp l2tp: check sockaddr length in pppol2tp_connect() 2018-04-29 07:50:04 +02:00
l3mdev
lapb
llc llc: better deal with too small mtu 2018-05-26 08:48:46 +02:00
mac80211 mac80211: Add RX flag to indicate ICV stripped 2018-05-16 10:06:46 +02:00
mac802154
mpls mpls, nospec: Sanitize array index in mpls_label_ok() 2018-03-11 16:19:47 +01:00
netfilter ipvs: fix rtnl_lock lockups caused by start_sync_thread 2018-05-16 10:06:49 +02:00
netlabel netlabel: add address family checks to netlbl_{sock,req}_delattr() 2016-08-20 18:09:22 +02:00
netlink netlink: fix uninit-value in netlink_sendmsg 2018-05-16 10:06:50 +02:00
netrom
nfc NFC: fix device-allocation error return 2017-11-30 08:37:23 +00:00
openvswitch openvswitch: Delete conntrack entry clashing with an expectation. 2018-03-24 10:58:43 +01:00
packet net: af_packet: fix race in PACKET_{R|T}X_RING 2018-04-29 07:50:06 +02:00
phonet phonet: properly unshare skbs in phonet_rcv() 2016-01-31 11:29:00 -08:00
rds rds; Reset rs->rs_bound_addr in rds_add_bound() failure path 2018-04-13 19:50:13 +02:00
rfkill rfkill: gpio: fix memory leak in probe error path 2018-05-16 10:06:51 +02:00
rose
rxrpc rxrpc: check return value of skb_to_sgvec always 2018-04-13 19:50:23 +02:00
sched net sched actions: fix dumping which requires several messages to user space 2018-04-13 19:50:27 +02:00
sctp sctp: do not check port in sctp_inet6_cmp_addr 2018-04-29 07:50:05 +02:00
sunrpc rpc_pipefs: fix double-dput() 2018-04-24 09:32:11 +02:00
switchdev switchdev: pass pointer to fib_info instead of copy 2016-06-24 10:18:16 -07:00
tipc tipc: add policy for TIPC_NLA_NET_ADDR 2018-04-29 07:50:06 +02:00
unix net/unix: don't show information about sockets from other namespaces 2017-11-18 11:11:06 +01:00
vmw_vsock vsock: use new wait API for vsock_stream_sendmsg() 2017-11-30 08:37:19 +00:00
wimax
wireless nl80211: Sanitize array index in parse_txq_params 2018-02-25 11:03:53 +01:00
x25 net: x25: fix one potential use-after-free issue 2018-04-13 19:50:07 +02:00
xfrm xfrm_user: fix return value from xfrm_user_rcv_msg 2018-05-16 10:06:51 +02:00
compat.c audit: log 32-bit socketcalls 2017-10-08 10:14:18 +02:00
Kconfig Make DST_CACHE a silent config option 2018-02-25 11:03:37 +01:00
Makefile
socket.c bpf: introduce BPF_JIT_ALWAYS_ON config 2018-02-03 17:04:24 +01:00
sysctl_net.c net: Use ns_capable_noaudit() when determining net sysctl permissions 2016-09-15 08:27:50 +02:00